<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>边框</title>
		<style>
			*{
				margin: 0;
			}
			.d1{
				height: 300px;
				border-width: 50px;
				border-style: ridge;
				border-color: #7FFFD4;
				margin: 34px;
			}
			.d2{
				height: 200px;
				/* width: 400px; */
				border: 20px  solid greenyellow;
				border-bottom: 1px solid red;
				border-width: 10px  50px;
				margin: 100px;
			}
		</style>
	</head>
	<body>
		<div class="d1">1</div>
		<div class="d2">2</div>
	</body>
</html>
